Quantum speedup from nonclassical polarization

• URL: http://arxiv.org/abs/2603.23124v1
• Date: Tue, 24 Mar 2026 12:18:42 GMT
• Title: Quantum speedup from nonclassical polarization
• Abstract summary: We compute the speed limit that bounds the rate of change of the state achievable without generating quantum coherence.<n>A comparison with the unrestricted quantum speed limit enables the quantitative identification of speedups arising from polarization nonclassicality.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We develop a framework for identifying nonclassical speedups in systems with polarization, likewise spin degrees of freedom. By confining the dynamics to the manifold of angular momentum coherent states, which act as the classical reference in this case, we compute the speed limit that bounds the rate of change of the state achievable without generating quantum coherence. A comparison with the unrestricted quantum speed limit enables the quantitative identification of speedups arising from polarization nonclassicality. We apply this framework to the cross-Kerr interaction, demonstrating a persistent speedup scaling as $\mathcal{O}(\sqrt{N})$ with the photon number $N$. The results establish polarization nonclassicality as a genuine dynamical resource, linking quantum coherence to quantum-enhanced evolution speeds in nonlinear photonic systems.

Related papers

• Realization of Trapped Ion Dynamics in the Strong-Field Regime and Non-Markovianity [33.781064984238775]
  We experimentally investigate the dynamics of a trapped ion where the Rabi frequency (Omega) approaches the vibrational mode frequency (nu)<n>Using quantum state tomography, we reconstruct the density matrix and track its evolution to assess non-Markovianity.<n>Our findings establish a pathway for using trapped-ion platforms to investigate non-Markovianity, coherent control, and the fundamental behavior of open quantum systems in extreme regimes.
  arXiv  Detail & Related papers  (2025-10-23T11:25:09Z)
• Quantum Speed Limits in Qubit Dynamics Driven by Bistable Random Telegraph Noise: From Markovian to Non-Markovian Regimes [0.0]
  We investigate the quantum speed limit (QSL) of a single superconducting qubit subjected to pure dephasing induced by bistable random telegraph noise (RTN)<n>Using an exactly solvable model, we explore how the interplay between RTN parameters the switching rate, coupling strength, and initial condition governs the transition between Markovian and non-Markovian dynamics.
  arXiv  Detail & Related papers  (2025-04-22T11:45:34Z)
• Experimental realization and synchronization of a quantum van der Pol oscillator [18.069593561319177]
  We present a paradigmatic autonomous quantum driven-dissipative system with nonlinear damping, using a single trapped atom.<n>We demonstrate the existence of a quantum limit cycle in phase space in the absence of a drive.<n>We additionally show that synchronization can be enhanced with the help of squeezing perpendicular to the direction of the drive and, counterintuitively, linear dissipation.
  arXiv  Detail & Related papers  (2025-04-01T13:02:50Z)
• Time-dependent Neural Galerkin Method for Quantum Dynamics [39.63609604649394]
  We introduce a classical computational method for quantum dynamics that relies on a global-in-time variational principle.<n>Our scheme computes the entire state trajectory over a finite time window by minimizing a loss function that enforces the Schr"odinger's equation.<n>We showcase the method by simulating global quantum quenches in the paradigmatic Transverse-Field Ising model in both 1D and 2D.
  arXiv  Detail & Related papers  (2024-12-16T13:48:54Z)
• Attractive-repulsive interaction in coupled quantum oscillators [14.37149160708975]
  We find an interesting symmetry-breaking transition from quantum limit cycle oscillation to quantum inhomogeneous steady state. This transition is contrary to the previously known symmetry-breaking transition from quantum homogeneous to inhomogeneous steady state. Remarkably, we find the generation of entanglement associated with the symmetry-breaking transition that has no analogue in the classical domain.
  arXiv  Detail & Related papers  (2024-08-23T10:45:19Z)
• Quantum highway: Observation of minimal and maximal speed limits for few and many-body states [19.181412608418608]
  Inspired by the energy-time uncertainty principle, bounds have been demonstrated on the maximal speed at which a quantum state can change. We show that one can test the known quantum speed limits and that modifying a single Hamiltonian parameter allows the observation of the crossover of the different bounds on the dynamics.
  arXiv  Detail & Related papers  (2024-08-21T18:00:07Z)
• Quantum speed limit and nonclassicality in open quantum system models using the Wigner function [0.0]
  We study the quantum speed limit and the Wigner function of open system models.<n>The dependence of the coupling on the position of the qubits allows for the study of the dynamics in the collective regime.<n>The presence of quantum correlations is seen to speed up the evolution.
  arXiv  Detail & Related papers  (2024-06-03T19:03:26Z)
• Quantum speed limit for Kirkwood-Dirac quasiprobabilities [0.0]
  We derive quantum speed limits for two-time correlation functions arising from statistics of measurements.<n>Our quantum speed limits are derived from the Heisenberg-Robertson uncertainty relation, and set the minimal time at which a quasiprobability can become non-positive.<n>As an illustrative example, we apply these results to a conditional quantum gate, by determining the optimal condition giving rise to non-classicality at maximum speed.
  arXiv  Detail & Related papers  (2024-02-12T11:28:56Z)
• Quantum dynamical speedup for correlated initial states [0.0]
  We consider a model in which the system has a correlation with the environment. The influence of the initial correlation between the system and environment on the quantum speed limit is investigated.
  arXiv  Detail & Related papers  (2023-02-18T15:37:53Z)
• Spatiotemporal single-photon Airy bullets [20.416671946991904]
  Uninhibited control of the complex quantum wavefunction of a single photon has so far remained elusive. We synthesize in a robust and versatile manner arbitrary quantum nonspreadingtemporal light bullets.
  arXiv  Detail & Related papers  (2022-12-15T10:06:24Z)
• Quantum speed limit and divisibility of the dynamical map [0.0]
  The quantum speed limit (QSL) is the theoretical lower limit of the time for a quantum system to evolve from a given state to another one. We show that the speed-up can also be observed under P- and CP-divisible dynamics, and that the speed-up is not necessarily tied to the transition from P-divisible to non-P-divisible dynamics.
  arXiv  Detail & Related papers  (2021-01-28T10:01:17Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.